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Friday, October 27, 2006

Search for alien life turns to TV
"A new generation of ultra-powerful radio telescopes designed to peer into the origins of the universe could also be used to look for any radio or TV emissions by extraterrestrial civilisations, New Scientist says.

TV and radio broadcasts are in the 50-400 megahertz range, which overlaps with the frequency range of between tens and hundreds of megahertz made by radio waves from hydrogen atoms forged in the early universe.

Harvard University astrophysicists Abraham Loeb and Matias Zaldarriaga suggest that tell-tale spikes in the energy spectrum which are made by TV and radio broadcasts could be discernible to telescopes such as the Low-Frequency Array (LOFAR) now being built in the Netherlands."


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